﻿// Copyright (c) 2008, Colin Burn
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 
// * Neither the name of WTCL nor the names of its contributors may be
// used to endorse or promote products derived from this software
// without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;

using System.Linq;
using System.Text;

using WTCL.Data.Series.Interface;
using WTCL.Data.Type;

namespace WTCL.Data.Series.Group
{
    public class GroupSeries<TType, TSpanType> : SeriesBase<GroupData<TType, TSpanType>>, IGroupXAxisSeries, ISampleYAxisSeries<IDataType<TType, TSpanType>>
    {
        public IDataType<TType, TSpanType> LargestDisplayYValue
        {
            get
            {
                UpdateMinMax();
                return DataTypeMethods<TType, TSpanType>.Max(this.actualMinimum.Abs(), this.actualMaximum.Abs());
            }
        }

        public string LargestDisplayXValue
        {
            get
            {
                return "Bobbins";
            }
        }

        bool minMaxDirty = true;

        protected override void OnDataChanged(NotifyCollectionChangedEventArgs e)
        {
            if (e.OldItems != null)
            {
                foreach (GroupData<TType, TSpanType> data in e.OldItems)
                {
                    data.PropertyChanged -= new PropertyChangedEventHandler(OnDataPropertyChanged);
                }
            }

            if (e.NewItems != null)
            {
                foreach (GroupData<TType, TSpanType> data in e.NewItems)
                {
                    data.PropertyChanged += new PropertyChangedEventHandler(OnDataPropertyChanged);
                }
            }

            this.minMaxDirty = true;
        }

        private void OnDataPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            this.minMaxDirty = true;
        }

        private IDataType<TType, TSpanType> actualMinimum;
        private IDataType<TType, TSpanType> actualMaximum;

        public IDataType<TType, TSpanType> ActualYMinimum { get { UpdateMinMax(); return this.actualMinimum; } }
        public IDataType<TType, TSpanType> ActualYMaximum { get { UpdateMinMax(); return this.actualMaximum; } }

        private IDataType<TType, TSpanType> yMinimum;
        private IDataType<TType, TSpanType> yMaximum;

        public IDataType<TType, TSpanType> YMinimum
        {
            get { return this.yMinimum; }
            set
            {
                this.minMaxDirty = true;
                this.yMinimum = value;
            }
        }

        public IDataType<TType, TSpanType> YMaximum
        {
            get { return this.yMaximum; }
            set
            {
                this.minMaxDirty = true;
                this.yMaximum = value;
            }
        }

        private void UpdateMinMax()
        {
            if (this.minMaxDirty)
            {
                this.actualMinimum = null;
                this.actualMaximum = null;

                if (this.Samples.Count > 0)
                {
                    if (this.yMinimum != null)
                    {
                        this.actualMinimum = this.yMinimum;
                    }

                    if (this.yMaximum != null)
                    {
                        this.actualMaximum = this.yMaximum;
                    }

                    foreach (GroupData<TType, TSpanType> sample in this.Samples)
                    {
                        if (this.yMinimum == null)
                        {
                            this.actualMinimum = DataTypeMethods<TType, TSpanType>.Min(sample.Value, this.actualMinimum);
                        }

                        if (this.yMaximum == null)
                        {
                            this.actualMaximum = DataTypeMethods<TType, TSpanType>.Max(sample.Value, this.actualMaximum);
                        }
                    }
                }

                this.minMaxDirty = false;
            }
        }
    }
}
